Pen



FIG. 1 is a perspective view of a pen showing my new design;

FIG. 2 is a front elevation view of the pen of FIG. 1;

FIG. 3 is a rear elevation view of the pen of FIG. 1;

FIG. 4 is a right side elevation view of the pen of FIG. 1;

FIG. 5 is a left side elevation view of the pen of FIG. 1;

FIG. 6 is a top plan view of the pen of FIG. 1; and,

FIG. 7 is a bottom plan view of the pen of FIG. 1.

The broken lines in the drawings showing the clip in FIGS. 1, 2, and 4-7 are included for the purpose of illustrating an unclaimed feature that forms no part of the claimed design. 

The ornamental design for a pen, as shown and described. 